CONTAINEER
Developer Portal

Build with the Containeer API

Programmatic access to cross-source real estate intelligence: SEC EDGAR companies, REIT Schedule III properties, CMBS securitized loans, UK Land Registry, NYC ACRIS, and the unified knowledge graph that ties them together.

Request API access Open Swagger UI

Quick start

From zero to first response in under a minute.

1
Get your key
Request access via contact. Your account's API key is shown on your profile.
2
Authenticate
Send your key in the X-API-Key header on every request.
3
Make a call
Hit any endpoint under /api/v1/*. Responses are JSON; pagination is cursor-based where applicable.

Authentication

All /api/v1/* endpoints require an API key. Pass it as the X-API-Key header.

curl -H "X-API-Key: $CONTAINEER_API_KEY" \
  https://containeer-sec-production.up.railway.app/api/v1/companies?limit=5
Treat your API key like a password. Rotate it from your profile if you suspect exposure. The /health endpoint is the only public, unauthenticated route.

Make your first call

Search the unified property directory in three flavors.

import os
import requests

API_BASE = "https://containeer-sec-production.up.railway.app/api/v1"
API_KEY = os.environ["CONTAINEER_API_KEY"]

response = requests.get(
    f"{API_BASE}/unified/properties/search",
    params={"q": "Rockefeller Plaza", "limit": 10},
    headers={"X-API-Key": API_KEY},
)
response.raise_for_status()
data = response.json()

for prop in data["data"]:
    print(f"{prop['canonical_address']} ({prop['source']})")

Endpoint explorer

A curated tour of the most useful endpoints. The full reference lives in Swagger UI.

GET/api/v1/companies
Paginated company directory across SEC EDGAR + GLEIF.
Query params
qstring— Free-text search across canonical names and tickers.
limitint— Max records (1-200, default 50).
cursorstring— Opaque cursor for pagination.
Response shape
{ data: Company[], next_cursor: string | null, total: number }
GET/api/v1/companies/{company_hash_id}
Full company profile by 16-char hash ID. Backward compatible with bare CIK.
Response shape
{ company_hash_id, cik, lei, canonical_name, sic_description, jurisdiction, ... }
GET/api/v1/linking/companies/{company_id}/linked-properties
Properties linked to a company by entity resolution (owned, financed, serviced, originated).
Query params
rolestring— Filter by role: owner | lender | servicer | originator.
limitint— Max properties (default 100, max 500).
Response shape
{ properties_by_role: { owned: [], financed: [], serviced: [], originated: [] } }

Rate limits & fair use

No hard rate limits today. We expect reasonable use — sustained traffic above ~10 requests per second from a single key may be throttled.

Bulk extraction workloads should batch requests with cursor pagination and exponential backoff on5xx responses. Contact us if you need higher volumes; dedicated keys are available for enterprise.

Changelog

Recent additions to the public surface.

v1.4
April 2026
  • —Knowledge Graph endpoints live (/api/v1/kg/*) — 13 tables, ~952K rows
  • —Cross-source property entities (NYC ACRIS + Cook County) added to unified directory
  • —Schedule III financials exposed on REIT property detail
v1.3
March 2026
  • —Asset Explorer pins MV (gold.explorer_pins) with 4.88M cross-source records
  • —UK Land Registry + NYC ACRIS geocoding integrated into the map
v1.2
February 2026
  • —Unified property directory (ABS-EE + REIT + UK + NYC) at /api/v1/unified/properties
  • —16-char hash IDs for stable, source-agnostic entity URLs

Ready to build?

Request API access and start integrating cross-source real estate intelligence today.

Request API access Full API reference